ELI5: Explain Like I'm 5

Normed lattice

Okay, so let's say you have a group of toys. You want to keep them organized, so you put them in a box. But you also want to know how far apart the toys are in the box. To do this, you draw lines on the sides of the box to create a grid. Each square on the grid is the same size, and you can use it to measure the distance between the toys.

This is similar to what a normed lattice does. A normed lattice is a mathematical system that uses a grid-like structure to measure distances between points. It works like this:

First, you have a set of points. These can be any kind of mathematical object, like numbers, vectors, or functions.

Next, you create a lattice by drawing lines between the points. The lines have to follow a set of rules, like they always have to be parallel or have the same angles. Each square on the lattice has the same size, just like the squares on the box grid.

Finally, you add a "norm" to the lattice. This is a way to measure distances between points on the lattice. For example, you might use the "taxicab norm," which measures distance by counting how many squares you have to move horizontally and vertically to get from one point to another. Or you might use the "Euclidean norm," which measures distance using the length of a straight line between two points.

Once you have a normed lattice, you can use it to solve all kinds of mathematical problems, like finding the shortest distance between two points or calculating the area of a shape. Plus, it keeps your mathematical objects organized, just like the box keeps your toys organized!